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/*
* linux/drivers/video/omap2/dss/sdi.c
*
* Copyright (C) 2009 Nokia Corporation
* Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#define DSS_SUBSYS_NAME "SDI"
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/regulator/consumer.h>
#include <linux/export.h>
#include <linux/platform_device.h>
#include <video/omapdss.h>
#include "dss.h"
static struct {
bool update_enabled;
struct regulator *vdds_sdi_reg;
} sdi;
static void sdi_basic_init(struct omap_dss_device *dssdev)
{
dispc_mgr_set_io_pad_mode(DSS_IO_PAD_MODE_BYPASS);
dispc_mgr_enable_stallmode(dssdev->manager->id, false);
dispc_mgr_set_lcd_type_tft(dssdev->manager->id);
dispc_mgr_set_tft_data_lines(dssdev->manager->id, 24);
dispc_lcd_enable_signal_polarity(1);
}
int omapdss_sdi_display_enable(struct omap_dss_device *dssdev)
{
struct omap_video_timings *t = &dssdev->panel.timings;
struct dss_clock_info dss_cinfo;
struct dispc_clock_info dispc_cinfo;
u16 lck_div, pck_div;
unsigned long fck;
unsigned long pck;
int r;
if (dssdev->manager == NULL) {
DSSERR("failed to enable display: no manager\n");
return -ENODEV;
}
r = omap_dss_start_device(dssdev);
if (r) {
DSSERR("failed to start device\n");
goto err_start_dev;
}
r = regulator_enable(sdi.vdds_sdi_reg);
if (r)
goto err_reg_enable;
r = dispc_runtime_get();
if (r)
goto err_get_dispc;
sdi_basic_init(dssdev);
/* 15.5.9.1.2 */
dssdev->panel.timings.data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE;
dssdev->panel.timings.sync_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE;
r = dss_calc_clock_div(t->pixel_clock * 1000, &dss_cinfo, &dispc_cinfo);
if (r)
goto err_calc_clock_div;
fck = dss_cinfo.fck;
lck_div = dispc_cinfo.lck_div;
pck_div = dispc_cinfo.pck_div;
pck = fck / lck_div / pck_div / 1000;
if (pck != t->pixel_clock) {
DSSWARN("Could not find exact pixel clock. Requested %d kHz, "
"got %lu kHz\n",
t->pixel_clock, pck);
t->pixel_clock = pck;
}
dss_mgr_set_timings(dssdev->manager, t);
r = dss_set_clock_div(&dss_cinfo);
if (r)
goto err_set_dss_clock_div;
dispc_mgr_set_clock_div(dssdev->manager->id, &dispc_cinfo);
dss_sdi_init(dssdev->phy.sdi.datapairs);
r = dss_sdi_enable();
if (r)
goto err_sdi_enable;
mdelay(2);
r = dss_mgr_enable(dssdev->manager);
if (r)
goto err_mgr_enable;
return 0;
err_mgr_enable:
dss_sdi_disable();
err_sdi_enable:
err_set_dss_clock_div:
err_calc_clock_div:
dispc_runtime_put();
err_get_dispc:
regulator_disable(sdi.vdds_sdi_reg);
err_reg_enable:
omap_dss_stop_device(dssdev);
err_start_dev:
return r;
}
EXPORT_SYMBOL(omapdss_sdi_display_enable);
void omapdss_sdi_display_disable(struct omap_dss_device *dssdev)
{
dss_mgr_disable(dssdev->manager);
dss_sdi_disable();
dispc_runtime_put();
regulator_disable(sdi.vdds_sdi_reg);
omap_dss_stop_device(dssdev);
}
EXPORT_SYMBOL(omapdss_sdi_display_disable);
static int __init sdi_init_display(struct omap_dss_device *dssdev)
{
DSSDBG("SDI init\n");
if (sdi.vdds_sdi_reg == NULL) {
struct regulator *vdds_sdi;
vdds_sdi = dss_get_vdds_sdi();
if (IS_ERR(vdds_sdi)) {
DSSERR("can't get VDDS_SDI regulator\n");
return PTR_ERR(vdds_sdi);
}
sdi.vdds_sdi_reg = vdds_sdi;
}
return 0;
}
static void __init sdi_probe_pdata(struct platform_device *pdev)
{
struct omap_dss_board_info *pdata = pdev->dev.platform_data;
int i, r;
for (i = 0; i < pdata->num_devices; ++i) {
struct omap_dss_device *dssdev = pdata->devices[i];
if (dssdev->type != OMAP_DISPLAY_TYPE_SDI)
continue;
r = sdi_init_display(dssdev);
if (r) {
DSSERR("device %s init failed: %d\n", dssdev->name, r);
continue;
}
r = omap_dss_register_device(dssdev, &pdev->dev, i);
if (r)
DSSERR("device %s register failed: %d\n",
dssdev->name, r);
}
}
static int __init omap_sdi_probe(struct platform_device *pdev)
{
sdi_probe_pdata(pdev);
return 0;
}
static int __exit omap_sdi_remove(struct platform_device *pdev)
{
omap_dss_unregister_child_devices(&pdev->dev);
return 0;
}
static struct platform_driver omap_sdi_driver = {
.remove = __exit_p(omap_sdi_remove),
.driver = {
.name = "omapdss_sdi",
.owner = THIS_MODULE,
},
};
int __init sdi_init_platform_driver(void)
{
return platform_driver_probe(&omap_sdi_driver, omap_sdi_probe);
}
void __exit sdi_uninit_platform_driver(void)
{
platform_driver_unregister(&omap_sdi_driver);
}
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